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Offshore Wind Energy
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Offshore Wind Energy

A special issue of Journal of Marine Science and Engineering (ISSN 2077-1312).

Deadline for manuscript submissions: closed (12 December 2016) | Viewed by 30744

Special Issue Editor

Prof. Dr. Simon J. Watson

E-Mail Website
Guest Editor
Faculty of Aerospace Engineering, Delft University of Technology, 2629 HS Delft, The Netherlands
Interests: wind power; wind resource assessment; wind turbine wake modeling; climate change impacts on wind energy; integration of renewable energy into networks; wind turbine condition monitoring
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Due to restrictions on land availability and higher potential resources, there has been a move to develop offshore wind farms in recent years. This brings its own particular challenges that have not necessarily been seen during the past few decades with onshore development. This Special Issue on “Offshore Wind Energy” will consider a number of areas that are important for the development of offshore wind energy, including, though not restricted to:

  • Wind resource
  • Remote sensing
  • Wind power forecasting
  • Wake losses
  • Operations and maintenance
  • Turbine design
  • Aerodynamics and loading
  • Fixed and floating structures
  • Offshore wind turbine and wind farm control
  • Electrical connections, e.g., AC vs. DC

This Special Issue will provide a compilation of current state-of-the-art and future perspectives related to modelling, measurements, and experiments in the field of offshore wind energy research.

Prof. Simon Watson
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Journal of Marine Science and Engineering is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.


Keywords

  • offshore
  • wind
  • resource
  • wakes
  • turbines
  • structures
  • operations and maintenance
  • control
  • electrical connections

Published Papers (3 papers)

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Research

6860 KiB  
Article
Improved Methodology of Weather Window Prediction for Offshore Operations Based on Probabilities of Operation Failure
by Tomas Gintautas and John Dalsgaard Sørensen
J. Mar. Sci. Eng. 2017, 5(2), 20; https://doi.org/10.3390/jmse5020020 - 02 May 2017
Cited by 26 | Viewed by 8008
Abstract
The offshore wind industry is building and planning new wind farms further offshore due to increasing demand on sustainable energy production and already occupied prime resource locations closer to shore. Costs of operation and maintenance, transport and installation of offshore wind turbines already [...] Read more.
The offshore wind industry is building and planning new wind farms further offshore due to increasing demand on sustainable energy production and already occupied prime resource locations closer to shore. Costs of operation and maintenance, transport and installation of offshore wind turbines already contribute significantly to the cost of produced electricity and will continue to increase, due to moving further offshore, if the current techniques of predicting offshore wind farm accessibility are to stay the same. The majority of offshore operations are carried out by specialized ships that must be hired for the duration of the operation. Therefore, offshore wind farm accessibility and costs of offshore activities are primarily driven by the expected number of operational hours offshore and waiting times for weather windows, suitable for offshore operations. Having more reliable weather window estimates would result in better wind farm accessibility predictions and, as a consequence, potentially reduce the cost of offshore wind energy. This paper presents an updated methodology of weather window prediction that uses physical offshore vessel and equipment responses to establish the expected probabilities of operation failure, which, in turn, can be compared to maximum allowable probability of failure to obtain weather windows suitable for operation. Two case studies were performed to evaluate the feasibility of the improved methodology, and the results indicated that it produced consistent and improved results. In fact, the updated methodology predicts 57% and 47% more operational hours during the test period when compared to standard alpha-factor and the original methodologies. Full article
(This article belongs to the Special Issue Offshore Wind Energy)
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827 KiB  
Article
Scheduling of Maintenance Tasks and Routing of a Joint Vessel Fleet for Multiple Offshore Wind Farms
by Nora Tangen Raknes, Katrine Ødeskaug, Magnus Stålhane and Lars Magnus Hvattum
J. Mar. Sci. Eng. 2017, 5(1), 11; https://doi.org/10.3390/jmse5010011 - 10 Feb 2017
Cited by 31 | Viewed by 5076
Abstract
Maintenance costs related to offshore wind farms are severely limiting their potential for being profitable. This paper proposes a new mathematical model that considers how maintenance tasks should be scheduled and performed by technicians transported using a fleet of dedicated vessels. The model [...] Read more.
Maintenance costs related to offshore wind farms are severely limiting their potential for being profitable. This paper proposes a new mathematical model that considers how maintenance tasks should be scheduled and performed by technicians transported using a fleet of dedicated vessels. The model is novel in its combination of modelling several work shifts and including vessels that can stay offshore for several shifts, while handling large maintenance tasks and accurate calculation of downtime costs. Simulation is used to evaluate the performance of the model in its pure form, as well as when solved heuristically using a rolling horizon heuristic. The results indicate that the end-of-horizon effects of the mathematical formulation are handled effectively. Computational experiments also illustrate how the mathematical model coupled with simulation can be used to evaluate strategic decisions regarding the composition of a vessel fleet used to execute maintenance tasks. Full article
(This article belongs to the Special Issue Offshore Wind Energy)
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2250 KiB  
Article
Expected Effects of Offshore Wind Farms on Mediterranean Marine Life
by Laura Bray, Sofia Reizopoulou, Evangelos Voukouvalas, Takvor Soukissian, Carme Alomar, Maite Vázquez-Luis, Salud Deudero, Martin J. Attrill and Jason M. Hall-Spencer
J. Mar. Sci. Eng. 2016, 4(1), 18; https://doi.org/10.3390/jmse4010018 - 03 Mar 2016
Cited by 27 | Viewed by 16007
Abstract
Current climate policy and issues of energy security mean wind farms are being built at an increasing rate to meet energy demand. As wind farm development is very likely in the Mediterranean Sea, we provide an assessment of the offshore wind potential and [...] Read more.
Current climate policy and issues of energy security mean wind farms are being built at an increasing rate to meet energy demand. As wind farm development is very likely in the Mediterranean Sea, we provide an assessment of the offshore wind potential and identify expected biological effects of such developments in the region. We break new ground here by identifying potential offshore wind farm (OWF) “hotspots” in the Mediterranean. Using lessons learned in Northern Europe, and small-scale experiments in the Mediterranean, we identify sensitive species and habitats that will likely be influenced by OWFs in both these hotspot areas and at a basin level. This information will be valuable to guide policy governing OWF development and will inform the industry as and when environmental impact assessments are required for the Mediterranean Sea. Full article
(This article belongs to the Special Issue Offshore Wind Energy)
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